Data Validation
The DataGrid allows you to validate user input. You can apply pre-defined validation rules or custom rules to individual columns.
In this demo, the following rules are used:
- required
Specifies that cells should not be empty. - pattern
Specifies a pattern that cell values should match. - email
Specifies that cell values match the Email pattern. - async
Specifies custom validation parameters that are used to validate a value on the server.
For more information on these and other validation rules, refer to the following documentation section: Validation Rules.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
Thank you!
We appreciate your feedback.
We appreciate your feedback.
<dx-data-grid
id="gridContainer"
[dataSource]="dataSource"
[columnAutoWidth]="true"
[showBorders]="true"
[repaintChangesOnly]="true">
<dxo-paging [enabled]="false"></dxo-paging>
<dxo-editing
mode="batch"
[allowUpdating]="true"
[allowAdding]="true">
</dxo-editing>
<dxi-column dataField="FirstName">
<dxi-validation-rule type="required"></dxi-validation-rule>
</dxi-column>
<dxi-column dataField="LastName">
<dxi-validation-rule type="required"></dxi-validation-rule>
</dxi-column>
<dxi-column dataField="Position">
<dxi-validation-rule type="required"></dxi-validation-rule>
</dxi-column>
<dxi-column dataField="Phone">
<dxi-validation-rule type="required"></dxi-validation-rule>
<dxi-validation-rule
type="pattern"
[pattern]="pattern" message="Your phone must have "(555) 555-5555" format!"
></dxi-validation-rule>
</dxi-column>
<dxi-column dataField="Email">
<dxi-validation-rule type="required"></dxi-validation-rule>
<dxi-validation-rule type="email"></dxi-validation-rule>
<dxi-validation-rule
type="async"
message="Email address is not unique"
[validationCallback]="asyncValidation">
</dxi-validation-rule>
</dxi-column>
</dx-data-grid>
import { NgModule, Component, enableProdMode } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { HttpClient, HttpClientModule } from '@angular/common/http';
import { DxDataGridModule } from 'devextreme-angular';
import * as AspNetData from "devextreme-aspnet-data-nojquery";
if(!/localhost/.test(document.location.host)) {
enableProdMode();
}
@Component({
styleUrls: ['app/app.component.css'],
selector: 'demo-app',
templateUrl: 'app/app.component.html'
})
export class AppComponent {
pattern: any = /^\(\d{3}\) \d{3}-\d{4}$/i;
constructor(private httpClient: HttpClient) {
this.url = "https://js.devexpress.com/Demos/Mvc/api/DataGridEmployeesValidation";
this.dataSource = AspNetData.createStore({
key: "ID",
loadUrl: this.url,
insertUrl: this.url,
updateUrl: this.url,
deleteUrl: this.url,
onBeforeSend: function(method, ajaxOptions) {
ajaxOptions.xhrFields = { withCredentials: true };
}
});
this.asyncValidation = this.asyncValidation.bind(this);
}
asyncValidation(params) {
return this.httpClient.post("https://js.devexpress.com/Demos/Mvc/RemoteValidation/CheckUniqueEmailAddress", {
id: params.data.ID,
email: params.value
}, {
responseType: "json"
}).toPromise();
}
}
@NgModule({
imports: [
BrowserModule,
HttpClientModule,
DxDataGridModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule { }
platformBrowserDynamic().bootstrapModule(AppModule);
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here:
// https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/
System.config({
transpiler: 'ts',
typescriptOptions: {
module: "system",
emitDecoratorMetadata: true,
experimentalDecorators: true
},
meta: {
'typescript': {
"exports": "ts"
},
'devextreme-aspnet-data-nojquery': {
"esModule": true
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js',
'typescript': 'npm:typescript@3.4.5/lib/typescript.js',
'@angular': 'npm:@angular',
'tslib': 'npm:tslib/tslib.js',
'rxjs': 'npm:rxjs',
'devextreme-aspnet-data-nojquery': 'npm:devextreme-aspnet-data-nojquery@2.6.1',
'devextreme': 'npm:devextreme@20.1',
'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js',
'quill': 'npm:quill@1.3.7/dist/quill.js',
'devexpress-diagram': 'npm:devexpress-diagram@1.0.9',
'devexpress-gantt': 'npm:devexpress-gantt@1.0.7',
'devextreme-angular': 'npm:devextreme-angular@20.1'
},
packages: {
'app': {
main: './app.component.ts',
defaultExtension: 'ts'
},
'devextreme': {
defaultExtension: 'js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
},
packageConfigPaths: [
"npm:*/package.json",
"npm:@angular/*/package.json",
"npm:@angular/common/*/package.json",
"npm:rxjs/operators/package.json",
"npm:devextreme-angular@20.1/*/package.json",
"npm:devextreme-angular@20.1/ui/*/package.json",
]
});
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.6/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.6/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js@0.10.2/dist/zone.js"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script src="config.js"></script>
<script>
System.import('app').catch(console.error.bind(console));
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<demo-app>Loading...</demo-app>
</div>
</body>
</html>